Insecticide



1 and ortho-dichlorbenzene is formed.

chlorbenzene is a solid insecticide and finds use 55 weigh I Nov. 27,

-msnc'ncma Joseph Savage, Buncorn, Fred-Holt, Weybridge,

and Richard Thomas, land, assignora to Imperial n-on-Teea, Eng. ChemicalIndustriea Hmited, a corporation of Great Britain No Drawing.Application August 20, 1931, serial 1 558,332. In Great Britain Augustan;

This invention relates to improvements in insecticides and it isthe mainobject of the invention to provide a solid insecticide, containing largeproportions of liquid insecticides such as alpha-chlornaphthalene,tetrachlorethane or ortho-dichlorbenzene and suitable for use as a soilfumigant.

When benzene is chlorinated to produce dichlorbenzene a mixture ofpara-dichlorbenzene Para-dias a soil fumigant, being injected into thesoil for this purpose, e. g. by means of the Jarvis injector.Ortho-dichlorbenzene is an insecticide but is a liquid and cannot beused in the same way as para-dichlorbenzene.

According to the-present invention, a solid insecticide suitable for useas a soil fumigant is obtained by reacting upon a mixture of a liquidingo secticide such as ortho-dichlorbenzene, alphachlomaphthalene ortetrachlorethane and/or a solid insecticide, such aspara-dichlorbenzene, hexachlorethane, or naphthalene; and a vulcanizableoil such as raw linseed oil, or sardine oil, or herring oil or whaleoil; or mixtures of two or more of these oils, with sulphur chloride.The known reaction between these oils and sulphur chloride setsinreadily with the evolution of hydrochlorie acid gas, leaving a solidmass which may be ground to a convenient size. Traces of residual acidare preferably neutralized by mixing the ground product with a smallproportion of a solid base, preferably tricalcium phosphate.

' The invention also consists in a cold-vulcanized oil containing aninsecticide such as a chlorinated hydrocarbon or preferably a mixture ofa liquid and solid insecticide.

. Example 1 Eleven parts by weight of the mixture obtained tum begins toset and quickly becomes a hard mass. When the reaction is complete themass is ground to a convenient size. The product'is dry and friable, isof a yellow 'or brown color and crystals of para-dichlorbenzene can beseen held in the solid lactice. Any traces of hydrochloric acid whichmay be present subsequent to grinding are neutralized by theincorporation of a small amount of calcium phosphate e: g. 1 per cent by1 part of Japanese pale sardine oil,

Similar products are obtained of mixtures containing,

(a) 35 per cent ortho-dichlorbenrene 65 per cent para-dichlorbenzene percent ortho-dichlorbenzene 40 per cent para-dichlorbenzene 80 per centortho-dichlorbenzene 20 per cent para-dichlorbenzene 60 per centortho-dichlorbenzene 40 per cent naphthalene (e) 60 per centalpha-chlornaphthalene 40 per cent naphthalene (f) 50 per centtetrachlorethane 50 per cent hexachlorethane These various mixtures setin from 'I to 30 minutes-giving yellow or brown productswhich are dryand friable.

Example 2 Similar results are obtained by working as in Example 1 butreplacing the 2 parts of raw linseed oil by (1) A mixture of 1 part ofraw linseed oil an byusingllparts' ner, thus giving a cheaper materialand avoiding the rejection of the ortho-dichlorbenzene. Further, whenusing para-dichlorbenzene alone as an insecticide it disappears byevaporation in about a. fortnight; the present insecticide evaporatesmore slowly so that the effective period of action is increased.

It is preferable to use a solid as well as a liquid insecticide, sincethe solid crystals assist in making the mass friable. In theabsence ofsolid insecticide, it is necessary to use far less total quantity ofinsecticide, because otherwise a sticky instead of a friable mass isobtained-silence the product is less active as the percentage content ofinsecticides is lower. Thus the addition of solid insecticide isregarded as most important.

We claim:

1. The process of producing a dry, friable insecticide which comprisesreacting with sulfur chloride a vulcanizable oil containing achlorinated hydrocarbon and coutihc the reaction products.

2. The process of producing a, solid insecticide which comprisesreacting suliur chloride with e vulcanizeble oil containing a, liquidchlorinated hydrocarbon.

3. The process oi producing a, solid insecticide which comprisesreacting sulfur chloride with o, vulcanizable oil containing a, solidchlorinated hydrocarbon.

4. The process of claim 2 in which the-liquid chlorinated hydrocarbon istaken from a group consisting of ortho-dichlor-henzene,elpho-chlorriophthelene, and tetrechlorethohe.

5. The process oi claim 3 in which the solid chlorinated hydrocarbon istaken from o, group consisting of pam-dichlorhenzene, hexachlorethane,and chlor-nephthmehe.

6. A cold-vulcenizcd oil containing a. chlorin cited hydrocarbon.

'3. ii cold-vulcanized oil containing or rare oi a liquid and solidchlorinated hydrocarbon 8. A solid insecticide comprising a chlorinatedhydrocarbon and a cold-vulcanized oil.

9. The product of claim 8 in which the chlorih= eted hydrocarbon istaken from a, group consisting of ortho-dichlorbee,ciphwchlornephthalene, and tetrachloree.

JOSEPH @AVAGE.

Hill)

